Update 274-h-index.js

Author: everthis

274-h-index.js

@@ -1,3 +1,23 @@
+/**
+ * @param {number[]} citations
+ * @return {number}
+ */
+const hIndex = function(citations) {
+  const n = citations.length
+  const arr = Array(n + 1).fill(0)
+  for(let e of citations) {
+    if(e >= n) arr[n]++
+    else arr[e]++
+  }
+  for(let i = n, sum = 0; i >= 0; i--) {
+    sum += arr[i]
+    if(sum >= i) return i
+  }
+  return 0
+};
+
+// another
+
 /**
  * @param {number[]} citations
  * @return {number}